CN109370273B - Production method of corrosion-resistant heavy-load railway steel rail - Google Patents
Production method of corrosion-resistant heavy-load railway steel rail Download PDFInfo
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- CN109370273B CN109370273B CN201811280736.3A CN201811280736A CN109370273B CN 109370273 B CN109370273 B CN 109370273B CN 201811280736 A CN201811280736 A CN 201811280736A CN 109370273 B CN109370273 B CN 109370273B
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- steel rail
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
- C09D5/10—Anti-corrosive paints containing metal dust
- C09D5/106—Anti-corrosive paints containing metal dust containing Zn
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2202/00—Metallic substrate
- B05D2202/10—Metallic substrate based on Fe
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
The invention relates to the field of corrosion-resistant heavy-duty railway rails, in particular to a production method for arranging a corrosion-resistant material on the surface layer of a steel rail so as to obtain a corrosion-resistant heavy-duty railway rail with excellent corrosion resistance, which comprises the following steps: after the online heat treatment is carried out by utilizing the rolling waste heat of the steel rail, the surface temperature of the steel rail is between 400 ℃ and 600 ℃, and then the waste heat is utilized to spray inorganic zinc-rich corrosion-resistant material on the surface of the steel rail, so that a zinc-iron complex is formed on the surface of the steel rail. After the online heat treatment is carried out on the rolling waste heat of the steel rail, the surface temperature of the steel rail is between 400 ℃ and 600 ℃, and then the waste heat is utilized to spray inorganic zinc-rich corrosion-resistant materials on the surface of the steel rail, so that a zinc-iron complex is formed on the surface of the steel rail, and the corrosion resistance is greatly improved. Meanwhile, the technical problem that spraying can be rapidly carried out in batches when the temperature is high is also solved. The invention is especially suitable for the production and preparation of the steel rail for the corrosion-resistant heavy-duty railway.
Description
Technical Field
The invention relates to the field of corrosion-resistant heavy-duty railway rails, in particular to a production method of a corrosion-resistant heavy-duty railway rail.
Background
With the development of railway industry at home and abroad, railways are gradually developed towards high speed or heavy load, and for heavy-load steel rails, the steel rails are required to have the characteristic of excellent corrosion resistance. When the steel rail for the heavy haul railway is used, the coal car is sprayed with the anti-freezing solution, and the anti-freezing solution is contacted with the steel rail after falling to a track bed, so that a corrosion pit is easily formed at the bottom of the steel rail, the steel rail is broken, and the operation safety of the line is seriously influenced. The existing spraying corrosion-resistant material has the defects of organic volatilization, slower drying of aqueous corrosion-resistant material and the like, and needs to meet the technical requirement that the spraying can be still carried out quickly in batches when the temperature of the steel rail is higher.
Disclosure of Invention
The invention aims to provide a production method of a steel rail for a corrosion-resistant heavy-duty railway, which is characterized in that a corrosion-resistant material is arranged on the surface layer of the steel rail, so that excellent corrosion resistance is obtained.
The technical scheme adopted by the invention for solving the technical problems is as follows: the production method of the steel rail for the corrosion-resistant heavy-load railway comprises the following steps: after the online heat treatment is carried out by utilizing the rolling waste heat of the steel rail, the surface temperature of the steel rail is between 400 ℃ and 600 ℃, and then the waste heat is utilized to spray inorganic zinc-rich corrosion-resistant material on the surface of the steel rail, so that a zinc-iron complex is formed on the surface of the steel rail.
Furthermore, after spraying, the thickness range of the corrosion-resistant material on the surface of the steel rail is 0.3-0.5 mm.
Furthermore, the inorganic zinc-rich coating is prepared by taking an inorganic polymer as a film forming substance, and adding zinc powder to react with the inorganic polymer.
Further, the inorganic polymer includes silicate, phosphate and dichromate.
Further, the steel rail comprises the following chemical components in percentage by mass: the carbon content is 0.7-1.2%, the total content of Si, Mn, Cr and V is less than or equal to 2.5%, the total content of P and S is less than or equal to 0.05%, and the balance is Fe.
Further, the temperature range of the steel rail during rolling is 800-950 ℃.
Further, the heat treatment starting temperature of the steel rail is 700-800 ℃.
Further, the cooling speed of the steel rail heat treatment of the steel rail is 1-3 ℃/s.
Further, the cast blank of the steel rail after pouring enters a slow cooling pit for slow cooling.
Further, the cooled steel billet is rolled by a seven-stand universal line rolling mill after being subjected to austenite homogenization.
The invention has the beneficial effects that: after the online heat treatment is carried out on the rolling waste heat of the steel rail, the surface temperature of the steel rail is between 400 ℃ and 600 ℃, and then the waste heat is utilized to spray inorganic zinc-rich corrosion-resistant materials on the surface of the steel rail, so that a zinc-iron complex is formed on the surface of the steel rail, and the corrosion resistance is greatly improved. Meanwhile, the technical problem that spraying can be rapidly carried out in batches when the temperature is high is also solved. The invention is especially suitable for the production and preparation of the steel rail for the corrosion-resistant heavy-duty railway.
Detailed Description
The production method of the steel rail for the corrosion-resistant heavy-duty railway comprises the steps of carrying out online heat treatment by using the rolling waste heat of the steel rail, enabling the surface temperature of the steel rail to be between 400 ℃ and 600 ℃, and spraying an inorganic zinc-rich corrosion-resistant material on the surface of the steel rail by using the waste heat so as to form a zinc-iron complex on the surface of the steel rail.
For heavy-duty steel rails, it is required that the steel rails have excellent corrosion resistance. When the steel rail for the heavy haul railway is used, the coal car is sprayed with the anti-freezing solution, and the anti-freezing solution is contacted with the steel rail after falling to a track bed, so that a corrosion pit is easily formed at the bottom of the steel rail, the steel rail is broken, and the operation safety of the line is seriously influenced. The existing spraying corrosion-resistant material has the defects of organic volatilization, slower drying of aqueous corrosion-resistant material and the like, and needs to meet the technical requirement that the spraying can be still carried out quickly in batches when the temperature of the steel rail is higher. Aiming at the defects in the prior art, the invention creatively utilizes the waste heat after the on-line heat treatment of the steel rail rolling waste heat to spray inorganic zinc-rich corrosion-resistant material on the surface of the steel rail so as to form a zinc-iron complex on the surface of the steel rail, thereby greatly optimizing the corrosion resistance of the steel rail. By combining practical experience, the thickness range of the corrosion-resistant material on the surface of the steel rail is preferably 0.3-0.5mm after spraying, so that the balance between product performance and product cost control can be well realized, and the balance between quality, manufacturing cost and service life is also well realized by the technical scheme of the invention.
In order to improve the corresponding corrosion resistance, the following scheme can be selected: the inorganic zinc-rich coating is prepared by taking an inorganic polymer as a film forming substance, adding zinc powder and reacting with the inorganic polymer. Among them, the inorganic polymer preferably includes silicate, phosphate and dichromate.
In order to ensure the quality of the final heavy-duty steel rail, the steel rail itself can be further optimized, and the following scheme can be selected: the steel rail comprises the following chemical components in percentage by mass: the carbon content is 0.7-1.2%, the total content of Si, Mn, Cr and V is less than or equal to 2.5%, the total content of P and S is less than or equal to 0.05%, and the balance is Fe. For the rail, there are also the following preferred embodiments: the temperature range of the steel rail during rolling is 800-950 ℃; the heat treatment starting temperature of the steel rail is 700-800 ℃; the cooling speed of the steel rail heat treatment of the steel rail is 1-3 ℃/s.
In the casting blank treatment process after the pouring of the steel rail, the following scheme can be selected: and the cast blank of the steel rail after pouring enters a slow cooling pit for slow cooling. In particular, it is preferable that the cooled steel slab is rolled by a seven-stand universal line rolling mill after being austenite-homogenized, thereby ensuring the quality of the obtained rail.
Examples
The following steel rail chemical components are selected in the embodiment of the invention and the corresponding comparative example.
TABLE 1 chemical composition/% of the example Steel rails
The comparative examples in the present invention used the same chemical composition, heating, rolling and in-line heat treatment processes as those of the examples.
A rail is sprayed with an inorganic zinc-rich corrosion resistant material by the method claimed in claim, wherein # 1 to # 3 are different spraying thicknesses, and # 4 is a comparative example which is not carburized. Subsequently, 4 samples were produced using the same heating, rolling and in-line heat treatment process.
TABLE 2 carburization thickness of billets of examples and comparative examples
The 4 steel rail sample slices were placed in a salt spray test chamber for 500 hours and the surface quality was observed as shown in table 3.
TABLE 3 examples and comparative examples Steel Rail salt fog test
In the invention, the steel rails with the same chemical composition are selected for comparison, and in the embodiment, the 3 treatment modes are the method in the invention. The comparison results in tables 1 to 3 show that the corrosion resistance of the steel rail is improved by spraying the inorganic zinc-rich material by using the waste heat.
In conclusion, the production method of the steel rail for the corrosion-resistant heavy-load railway, provided by the invention, is used for improving the corrosion resistance of the surface layer of the rail head of the steel rail, and meanwhile, the product is suitable for domestic and foreign heavy-load lines.
Claims (6)
1. The production method of the steel rail for the corrosion-resistant heavy-load railway is characterized by comprising the following steps of: after the online heat treatment is carried out by utilizing the rolling waste heat of the steel rail, the surface temperature of the steel rail is between 400 ℃ and 600 ℃, then the waste heat treatment is carried out, the surface of the steel rail is sprayed with an inorganic zinc-rich corrosion-resistant material, so that a zinc-iron complex is formed on the surface of the steel rail, after the spraying, the thickness range of the corrosion-resistant material on the surface of the steel rail is 0.3-0.5mm, the inorganic zinc-rich corrosion-resistant material is prepared by taking an inorganic polymer as a film-forming substance, adding zinc powder and reacting with the inorganic polymer, and the steel: the carbon content is 0.7-1.2%, the total content of Si, Mn, Cr and V is less than or equal to 2.5%, the total content of P and S is less than or equal to 0.05%, and the balance is Fe, wherein the inorganic polymer comprises silicate, phosphate and dichromate.
2. A method of producing a corrosion resistant heavy duty railway rail according to claim 1, characterized by: the temperature range of the steel rail during rolling is 800-950 ℃.
3. A method of producing a corrosion resistant heavy duty railway rail according to claim 1, characterized by: the heat treatment starting temperature of the steel rail is 700-800 ℃.
4. A method of producing a corrosion resistant heavy duty railway rail according to claim 1, characterized by: the cooling speed of the steel rail heat treatment of the steel rail is 1-3 ℃/s.
5. A method of producing a corrosion resistant heavy duty railway rail according to claim 1, characterized by: and the steel rail enters a slow cooling pit for slow cooling from the cast blank after pouring.
6. A process for producing a corrosion-resistant heavy-duty railway rail according to claim 5, characterized in that: and rolling the cooled steel billet by using a seven-stand universal line rolling mill after the austenite is uniform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811280736.3A CN109370273B (en) | 2018-10-30 | 2018-10-30 | Production method of corrosion-resistant heavy-load railway steel rail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811280736.3A CN109370273B (en) | 2018-10-30 | 2018-10-30 | Production method of corrosion-resistant heavy-load railway steel rail |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109370273A CN109370273A (en) | 2019-02-22 |
| CN109370273B true CN109370273B (en) | 2021-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811280736.3A Active CN109370273B (en) | 2018-10-30 | 2018-10-30 | Production method of corrosion-resistant heavy-load railway steel rail |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109821923A (en) * | 2019-02-26 | 2019-05-31 | 桂林理工大学 | A kind of production method of anti-corrosion coating plain bar |
| CN115261733B (en) * | 2022-08-18 | 2023-06-06 | 攀钢集团攀枝花钢铁研究院有限公司 | Abrasion-resistant corrosion-resistant steel rail for subway and production method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2541504Y (en) * | 2002-04-22 | 2003-03-26 | 攀枝花钢铁有限责任公司钢铁研究院 | Corrosion-resistant railway rail |
| CN102220545A (en) * | 2010-04-16 | 2011-10-19 | 攀钢集团有限公司 | High-carbon and high-strength heat-treated steel rail with high wear resistance and plasticity and manufacturing method thereof |
| CN107747040A (en) * | 2017-10-31 | 2018-03-02 | 攀钢集团攀枝花钢铁研究院有限公司 | Corrosion-resistant rail in high speed railway preparation method |
| CN108385022A (en) * | 2018-03-30 | 2018-08-10 | 鞍钢股份有限公司 | High-strength, high-toughness, wear-resistant and corrosion-resistant bainite steel rail for heavy-duty railway and manufacturing method thereof |
-
2018
- 2018-10-30 CN CN201811280736.3A patent/CN109370273B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2541504Y (en) * | 2002-04-22 | 2003-03-26 | 攀枝花钢铁有限责任公司钢铁研究院 | Corrosion-resistant railway rail |
| CN102220545A (en) * | 2010-04-16 | 2011-10-19 | 攀钢集团有限公司 | High-carbon and high-strength heat-treated steel rail with high wear resistance and plasticity and manufacturing method thereof |
| CN107747040A (en) * | 2017-10-31 | 2018-03-02 | 攀钢集团攀枝花钢铁研究院有限公司 | Corrosion-resistant rail in high speed railway preparation method |
| CN108385022A (en) * | 2018-03-30 | 2018-08-10 | 鞍钢股份有限公司 | High-strength, high-toughness, wear-resistant and corrosion-resistant bainite steel rail for heavy-duty railway and manufacturing method thereof |
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| CN109370273A (en) | 2019-02-22 |
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